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WorkingHardState.cpp
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1 /* -*- C++ -*-
2 
3 This file implements the WorkingHardState class.
4 
5 $ Author: Mirko Boehm $
6 $ Copyright: (C) 2005-2013 Mirko Boehm $
7 $ Contact: mirko@kde.org
8 http://www.kde.org
9 http://creative-destruction.me $
10 
11  This library is free software; you can redistribute it and/or
12  modify it under the terms of the GNU Library General Public
13  License as published by the Free Software Foundation; either
14  version 2 of the License, or (at your option) any later version.
15 
16  This library is distributed in the hope that it will be useful,
17  but WITHOUT ANY WARRANTY; without even the implied warranty of
18  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  Library General Public License for more details.
20 
21  You should have received a copy of the GNU Library General Public License
22  along with this library; see the file COPYING.LIB. If not, write to
23  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24  Boston, MA 02110-1301, USA.
25 
26 $Id: WorkingHardState.cpp 30 2005-08-16 16:16:04Z mirko $
27 */
28 
29 #include "WorkingHardState.h"
30 
31 #include <QtCore/QByteRef>
32 
33 #include "Job.h"
34 #include "Thread.h"
35 #include "WeaverImpl.h"
36 #include "ThreadWeaver.h"
37 #include "DebuggingAids.h"
38 
39 
40 using namespace ThreadWeaver;
41 
42 void WorkingHardState::activated()
43 {
44  weaver()->assignJobs();
45 }
46 
47 void WorkingHardState::suspend()
48 {
49  weaver()->setState ( Suspending );
50 }
51 
52 void WorkingHardState::resume()
53 {
54 }
55 
56 Job* WorkingHardState::applyForWork(Thread *th, Job* previous)
57 { // beware: this code is executed in the applying thread!
58  debug ( 2, "WorkingHardState::applyForWork: thread %i applies for work "
59  "in %s state.\n", th->id(),
60  qPrintable ( weaver()->state().stateName() ) );
61 
62  Job *next = weaver()->takeFirstAvailableJob(previous);
63  if ( next ) {
64  return next;
65  } else {
66  debug ( 2, "WorkingHardState::applyForWork: no work for thread %i, "
67  "blocking it.\n", th->id() );
68  weaver()->waitForAvailableJob( th );
69  // this is no infinite recursion: the state may have changed
70  // meanwhile, or jobs may have become available:
71  return weaver()->applyForWork( th, 0 );
72  }
73 }
74 
75 void WorkingHardState::waitForAvailableJob ( Thread *th )
76 {
77  weaver()->blockThreadUntilJobsAreBeingAssigned ( th );
78 }
79 
80 StateId WorkingHardState::stateId() const
81 {
82  return WorkingHard;
83 }
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